/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.log4j.net;

import java.net.Socket;
import java.net.ServerSocket;

import org.apache.log4j.Logger;
import org.apache.log4j.LogManager;
import org.apache.log4j.PropertyConfigurator;
import org.apache.log4j.xml.DOMConfigurator;

/**
 * A simple {@link SocketNode} based server.
 * 
 * <pre>
 * &lt;b&gt;Usage:&lt;/b&gt; java org.apache.log4j.net.SimpleSocketServer port configFile
 * 
 *    where &lt;em&gt;port&lt;/em&gt; is a part number where the server listens and
 *    &lt;em&gt;configFile&lt;/em&gt; is a configuration file fed to the {@link
 *    PropertyConfigurator} or to {@link DOMConfigurator} if an XML file.
 * </pre>
 * 
 * @author Ceki G&uuml;lc&uuml;
 * 
 * @since 0.8.4
 * */
public class SimpleSocketServer {

	static Logger cat = Logger.getLogger(SimpleSocketServer.class);

	static int port;

	public static void main(String argv[]) {
		if (argv.length == 2) {
			init(argv[0], argv[1]);
		} else {
			usage("Wrong number of arguments.");
		}

		try {
			cat.info("Listening on port " + port);
			ServerSocket serverSocket = new ServerSocket(port);
			while (true) {
				cat.info("Waiting to accept a new client.");
				Socket socket = serverSocket.accept();
				cat.info("Connected to client at " + socket.getInetAddress());
				cat.info("Starting new socket node.");
				new Thread(new SocketNode(socket, LogManager
						.getLoggerRepository())).start();
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	static void usage(String msg) {
		System.err.println(msg);
		System.err.println("Usage: java " + SimpleSocketServer.class.getName()
				+ " port configFile");
		System.exit(1);
	}

	static void init(String portStr, String configFile) {
		try {
			port = Integer.parseInt(portStr);
		} catch (java.lang.NumberFormatException e) {
			e.printStackTrace();
			usage("Could not interpret port number [" + portStr + "].");
		}

		if (configFile.endsWith(".xml")) {
			DOMConfigurator.configure(configFile);
		} else {
			PropertyConfigurator.configure(configFile);
		}
	}
}
